View tc74hc163p datasheet:

TC74HC163P IL00 C-MOS PRESETTABLE SYNCHRONOUS 4-BIT BINARY COUNTER —TOP VIEW— 9 LD IN 1 RD VDD 16 3 14 A QA 4 13 B QB IN 5 12 CK 2 15 OUT CO C QC 6 11 D QD IN A (DATA A) 3 14 OUT QA 2 IN B (DATA B) 4 13 OUT QB 7 15 EN1 CO IN 10 C (DATA C) 5 12 OUT QC EN2 RD 1 IN D (DATA D) 6 11 OUT QD IN EN1 7 10 IN EN2 8 GND 9 IN LD COUNT SEQUENCE MODE SELECTION OUTPUTS CONTROL INPUTS COUNT MODE QD QC QB QA RD LD EN1 EN2 0 0 0 0 0 RESET 0 x x x 1 (SYNCHRONOUS) 0 0 0 1 2 0 0 1 0 PRESET 1 0 x x 3 (SYNCHRONOUS) 0 0 1 1 4 0 1 0 0 1 1 0 x NO COUNT 5 0 1 0 1 NO COUNT 1 1 x 0 6 0 1 1 0 1 1 1 1 COUNT 7 0 1 1 1 8 1 0 0 0 CARRY OUTPUT “CO” 9 1 0 0 1 QA QB 10 1 0 1 0 QC CO 11 1 0 1 1 QD EN2 12 1 1 0